(After Damon tried to compel and kiss Elena...)

Damon Salvatore: Guess I could just seduce her... the old-fashioned way. Or I could just eat her.

Stefan Salvatore: No. You're not gonna hurt her, Damon.

Damon Salvatore: No?

Stefan Salvatore: Because deep down inside, there is a part of you that feels for her. I was worried that you had no humanity left inside of you... that you may have actually become the monster... that you pretend to be.

Damon Salvatore: Who's pretending?

Stefan Salvatore: Then kill me.

Damon Salvatore: Well, I'm tempted.

Stefan Salvatore: No, you're not. You've had lifetimes to do it, and yet, here I am. I'm still alive. And there you are. You're still haunting me. After 145 years. Katherine is dead. And you hate me because you loved her, and you torture me because you still do. And that, my brother, that is your humanity.